Si3N4 Ceramic Bearing Ball/High Precision Silicon Nitride Ball

Silicon Nitride (Si3N4) is a widely used ceramic material in high temperature application, it has high strength in both room temperature and high temperature condition, the strength of silicon nitride can be kept up to 1200℃; the low coefficient of thermal expansion make it a ceramic material possessing excellent thermal shock resistance; at the same time, it also has good thermal conductivity.

Except for the excellent properties in thermal application, silicon nitride also has good mechanical, chemical, electrical properties. It has good strength, good flexture strength and wear resistance;it is a good performance electrical insulation ceramic material; it is corrosive against all inorganic acid, most of organic acid solutions and some of caustic soda solutions.

Key Properties of Silicon Nitride
*High strength over a wide temperature range
*High fracture toughness
*High hardness
*Outstanding wear resistance, both impingement and frictional modes
*Good thermal shock resistance
*Good chemical resistance

UNIPRETEC provide high precision machining of Silicon Nitride ceramic components, with the experienced project engineers and talented workers, we can produce according to your drawings or designs, tight tolerance and good surface finishing can be reached.

Unit

95% Al2O3

99% Al2O3

ZrO2

GP-Si3N4

Color

-

white

ivory

white

gray

Density

g/cm³

3.65

3.88

5.95

3.22

Water Absorption

%

0

0

0

0

Young's Modulus

Gpa

280

350

205

295

Vickers Hardness

Gpa

14

20

12

18-20

Flexural Strength ( at R.T. )

Mpa

280

300

900

650

Compressive Strength ( at R.T. )

Mpa

2000

2500

2200

2200

Thermal Conductivity ( at R.T. )

W/(m.K)

18-25

30

2.2

25

Thermal Shock Resistance

ΔT(°C)

220

180-200

280-350

450-650

Max. Working Temperature ( at R.T. )

°C

1500

1700

850

1200

Volume Resistivity ( at R.T. )

Ω.cm

>10^15

>10^14

>10^12

>10^14

Dielectric Constant  (1 MHz at R.T. )

-

9.50

9.80

26

8.20

Dielectric Strength

kV/mm

16

22

-

16

As a professional company in advanced ceramic industries, UNIPRETEC is manufacturing and supplying high quality and high precision ceramic components for clients from worldwide. Our ceramic products are widely used in various fields of automotive, metallurgy, machinery, electronic & electrical, food, chemical, medical and so on. With experienced engineers and talented workers, we are able to evaluate projects and drawings properly, make valuable suggestion, supply satisfying products. Our materials including:

- Aluminium Oxide ( 95% 96% 99% 99.5% 99.7% Al2O3 )
- Zirconium Oxide ( Yttria stabilized ZrO2 )
- Silicon Nitride ( Gas pressure sintered & Hot pressed Si3N4 )
- Boron Carbide ( B4C )
- Boron Nitride ( Hot pressed BN )
- Machinable Glass Ceramic

Aiming at building long term cooperation relationship with our clients, we set our motto as "Quality First". Far now, our products have been exported to North Amirica, East Europe, West Europe, East Asia, Southeast Asia and get good reputation from our client.